48 
MANGOLD. 
not be certain they were of the ‘ Spotted Millepede,’ J. guttatus , but 
they appeared to be so from the description ”; and Mr. Riley further 
observed:—“I think there is no doubt that it is the Millepede you 
mention, as it quite agrees with the description given by Curtis in 
‘ Farm Insects.’ ” 
“ The Wurzel is completely eaten round within the ground, and 
then, of course, dies.” 
In this case heavy rain set in the day after the specimens were 
sent, and continued for some days, and, with the favourable weather, 
the plants grew past attack, so that only from about a third to half of 
the acre attacked was ultimately destroyed. Relatively to manure, it 
was noticed :—“ They cannot have been in the manure, as the other 
part is free : all done with the same. Besides fold-yard manure they 
had a dressing of 8 cwt. of kainite, also 1-| cwt. of rape-cake, and 
H cwt. of superphosphate.” 
The following communication, with which I was favoured by Mr. 
J. A. Smith, of Rise Hall, Fakenliam, is of much interest, as being 
a note from his own personal observation of the migration of another 
common kind of Millepede in large numbers from one locality to 
another. On the 31st of May, Mr. Smith forwarded me specimens 
agreeing with the common pitchy coloured Julns terrestris —the Earth 
Millepede, figured at p. 45—in appearance, but of remarkably large 
size, with the remark that “it was an injurious insect well known to 
us farmers”; and further mentioned:—“A few mornings since a 
turnpike-road in this neighbourhood was covered with these creatures, 
apparently travelling across from a field of Oats towards a piece of 
pasture-land. These Oats are in succession to Turnips fed off late; 
both crops were a partial failure perhaps from insect ravages. 
“ From the general direction of the insects’ travels across the road, 
I conclude that, the Oats having grown out of their way, they made 
tracks for a pasture on the other side of the highway. The simul¬ 
taneous movement of many of these creatures was to me a new and 
surprising circumstance.” 
On special inquiry Mr. Smith mentioned that he noticed the 
Millepedes as being of different sizes as they swarmed across the road; 
“ indeed, on that morning they crowded in such numbers that I 
crushed them under my feet, till I shuddered at the cracking noise.” 
This mention of the cracking noise is especially noteworthy, as the 
hard coats of these Millepedes distinguish them clearly from the 
common field caterpillars. 
The Oat field which the Millepedes appeared to be leaving had 
been in Wheat the previous year, followed by a “ catcli-crop ” of 
Turnips; and it is further mentioned that the occupier of this land, 
which is not in Mr. J. A. Smith’s hand, carted annually a quantity of 
